Heating-furnace



(No Model.) 2 Sheets-Sheet 1. W. H. RIDDELL.

HEATING FURNACE.

Patented July 41, 1890.

I W552 e I 1 awjwav WA;

-- g? I!" ah! 4 (No Model.) 2 Sheets-Sheet 2. W. H. RIDDELL.

HEATING FURNACE. No. 431,151. Patented July 1. 1890.

UNITED STATES PATENT OFFIC.

WILLIAM HENRY RIDDELL, OF NORTHFIELD, MINNESOTA.

HEATING-FURNACE.

SPECIFICATION forming part of Letters Patent No. 431,151 dated July 1,1890.

Application filed February 27, 1890- Sen'al No. 341,983. (No model.)

To all whom it may concern.-

Be it known that I, \VILLIAM HENRY RID- DELL, a citizen of the UnitedStates, residing at Northtield, in the county of Rice and State ofMinnesota, have invented certain new and useful Improvements inI-Ieati11g-Furnaccs; and I do hereby declare the following to be a full,clear, and exact description of the i11- vention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to furnaces for heating buildings, and has for itsobject the provision of means whereby the caloric generated by thecombustion of the fuel is more fully utilized to heat the incoming air.\Vith this end in View I mount on top of the furnace a pair of drums,through which the products of combustion pass on their way to thechimney, said drums being connected by a pipe, the elbow or angle ofwhich is so sharp that no soot can lodge therein. Passing through thedrums is a seriesof tubes or passages in communication with fresh'airpipes. The furnace, with its superimposed drums,is inclosed within theusual brick-work case, in the roof of which are pipes for conveying thehot air radiated from the drums and furnace to the various parts of thebuilding. A suitable damper is arranged in the exit-flue of the furnace,and has a stem provided with a handle on its forward end,by which it canbe turned to regulate the passage of the products of combustion. Byclosing this damper all the products of combustion can be made to makethe entire circuit of both drums to the exit-pipes, or the damper can beopened and the products allowed to pass equally into the drums or alarger portion into one drum than the other, as required. Forconvenience of transportation the body of the furnace can be made insections, secured together by suitable bolts at their flanged edges, andthe parts can be packed for shipment by being nested one within theother. Each drum is provided with an opening closed by a door orplug,-through which soot or ashes can be removed in the usual manner.Passages'are also formed in the outer walls of the brick-work near theSolbOtlJOlD, through which air is admitted to the pipes connected to thedrums. Bolts having flattened shanks are secured at intervals to thefurnace-bod y and serve to detaehably secure the end plates thereto, aswill be hereinafter described.

In the accompanying drawings, in which like symbols of reference areplaced on like parts throughout the several views, Figure 1 is a frontview of the furnace and its surrounding brick-work. Fig. 2 is a sideelevation of the invention detached. Fig. 3 is a cross-section on lineso at of Fig. Fig. 4 is a cross-section, and Fig. 5 a partiallongitudinal section, of a furnace-body constructed in two detachableparts connected together at their flanged edges by suitable bolts.

A is the body of the furnace, and a a are bolts having flattened endsriveted at intervals apart to the ends thereof.

B B are the front and rear end plates, which are perforated to receivethe threaded stems of the bolts to a, and are detachably secured inplace by nuts applied thereto.

a a are the usual grate and ash-pit.

O is the door of the furnace, and O that of the ash-pit.

D D are sheet-iron drums mounted on top of the furnace and incommunication by pipes d cl Withthe combustion-chamber thereof.

61 is a damper in pipe d',operated bya rod passing through the front endplate l3 and having a handle (1 d is an elbow-pipe connectlngthe drums DD, the elbow being so sharp that soot cannot lodge therein.

(1 d are passages or tubes extending diagonally through the drums, and dd are depending pipes for the admission of fresh air, connected to saidpassages at their upper ends and extending down below the body of thefurnace.

d is the exit-flue for the products of combustion attached to drum D.

E is the brick-work casing surrounding the furnace, and e is a fresh-airpipe leading thereto.

F F are pipes for conveying the heated air radiated from the drums andfurnace-body and contained in the chamber at the top of the surroundingcase to the points -desired.

G is a pipe connecting with pipe (1 and leading to the chimney.

e e are plugs closing ports in the brick Work or case E, and e is theusual water-pan mounted in the front Wall of the brick-Work.

In Figs. 3 and 4c the furnace-body is shown as made in two sections A Ahaving flanges a a 011 their meeting edges. In virtue of thlsconstruction the parts can be nested together for transportation, and ifone becomes burned out or unfit for use another can be readilysubstituted.

As shown, the furnace is adapted for the use of Wood or suitableequivalent material as fuel.

The furnace, with its superimposed drums, affords a largeradiating-surface, and the cold air admitted through the pipes cl andpassing through the passages in the drums will be quickly heated andWill pass through the pipes F F to the desired points.

The knockdown feature of the furnace 1s important, as by it the castingsand heavy sections of the body can be furnished to local dealers, whowill readily put them together and provide their own drums.

\Vhat I claim, and desire to secure by Letters Patent, is

1. A furnace-body, in combination with superimposed drums provided Withpassages therethrough forincoming air,a series of fresh air pipesleading to said passages, an elbow connecting one drum with the other,and pipes leading from the furnace-body to the drums, substantially asand for the purpose specified.

2. A furnace comprising a body provided with a grate,apair of connecteddrums, pipes for the products of combustion leading from thefurnace-body to the drums, an elbow having a sharp angle connecting onedrum with the other, a series of passages for incoming air formed ineach drum, and aseries of freshair-supp] y pipes connected with saidpassages and extending down on each side of the furnace, substantiallyas and for the purpose specified.

In testimony whereof I affix my signature in presence of tWo Witnesses.

\NILLIAM HENRY RID DELL.

Witnesses:

R. J. DRAKE, T. J. DOUGHERTY.

